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Qazvin, 
Iran
355,865 people lived in Qazvin in 2025. It is the 1599th largest of the world's 12,138 cities, and the 26th largest in Iran.
That figure counts the whole built-up area, not the area Qazvin governs, so it may be far from the number the city publishes about itself. How the UN measures a city.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Qazvin grew
For every 10 people in Qazvin in 1975, there were 30.5 in 2025.
On the UN's projection it will have 396,571 people in 2050. It passed 250,000 people between 1995 and 2000.
projected (after 2025) · how sure the UN is: high moderate low
How to read this: one column every five years, 1975 to 2050; its height is the number of people. Hatched columns are the UN's projection. The thin strip beneath says how sure the UN is of each figure: the stronger the colour, the surer. A blank means the place was not on the UN's list of cities that year.
People · your family's years · 1975 to 2050
Qazvin through your family’s years
Put in the years your family were born. You’ll see how many people lived in Qazvin in each of those years, and when each of them turned 30.
Iran · every city · 2025
Where it is
How to read this: Iran and its 210 cities in 2025, each a dot whose area is its number of people (the largest is Tehran). Qazvin is ringed, in colour; the other cities are grey. Neighbouring countries are outlines.
Area and built-up land · km²
How much land it covers
In 2025, Qazvin covered 39 km², and buildings, roads and other built-up land covered 11 km² of it. That is 32 m² of built-up land for each person, about a square 6 by 6 metres. Since 1975, its built-up land has grown to 2.5 times its size, and its people are 3.1 times as many.
How to read this: each pale square is the city's whole area, the strong square inside it the part that is built on; one scale for all three, so a bigger square is more land. Hatched is the UN's projection.
Of every 100 people in Iran
Its share of Iran
Of every 1,000 people in Iran in 2025, 4 lived in Qazvin, which is 355,865 people.
How to read this: 1,000 squares, one for every 1,000th person in Iran; the coloured squares live in Qazvin. The grey rest live in other cities, in towns or in the countryside.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 1595 Aizawl India356,620
- 1596 Vladikavkaz Russia356,422
- 1597 Memphis United States356,215
- 1598 Tula Russia356,025
- 1599 Qazvin355,865
- 1600 Korba India355,784
- 1601 Montes Claros Brazil355,651
- 1602 Vinh Vietnam355,643
- 1603 Satara India355,609
In Iran, 2025
- 1492 Bandar Abbas381,008
- 1539 Zanjan370,993
- 1544 Qarchak369,782
- 1565 Arak366,442
- 1599 Qazvin355,865
- 1742 Narmashir329,526
- 1764 Sanandaj325,425
- 1771 Khorramabad324,110
- 1793 Famenin320,591
How to read this: names are in order of size, the leading number being each city's rank among all 12,138 in 2025; the bars share a scale within a list. A jump in the ranks means a city under 300,000 people, which is not given a page here.
Apparatus
Sources and method
The figures for Qazvin are the UN's own, at five-year steps: an estimate for each of 1975 to 2025, then projection to 2050. Projected years are drawn hatched, and the UN publishes no range of uncertainty for a city. What a city means here, how the UN measures one, and why that number can differ from the one Qazvin publishes about itself: how the figures here are put together.
Sources: UN WUP 2025 · Natural Earth · flag-icons. Every source, its licence and how to cite it →
Verified 2026-09-30 · 73 canaries